8-Apr-2025
A systematic thermal reactivity analysis to reveal thermal safety of Si–C anodes
ParticuologyPeer-Reviewed Publication
An overview of the thermal safety of silicon–carbon anodes is conducted to identify the determinants of material reactivity and heat generation sources. In the hierarchical silicon–carbon anode, surface floating silicon exposed outside the carbon layer is a serious hazard affecting thermal safety, exhibiting a 77% increase in heat release at 100% state of charge. Maximum temperatures of 875.2 °C (532.1 °C for samples with less floating silicon) can be achieved when pouch cells with more floating silicon are conducted in the test of accelerating rate calorimeter. Additionally, this study explored the thermal safety of graphite anodes blending with varying ratios of silicon–carbon materials, confirming the potential safety risks associated with high silicon content lithium-ion batteries. This work presents a comprehensive understanding of the thermal characteristics of high-capacity silicon–carbon anodes, which provides insightful suggestions for enhancing the safety of next-generation silicon-based high-energy-density batteries.
- Journal
- Particuology
- Funder
- National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities, SEU Innovation Capability Enhancement Plan for Doctoral Students